South Nowra Surcharge Main - Major Upgrades

• Project StatusIn Progress
• Last reviewed 24 October 2024

About the project

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A review of the existing South Nowra Surcharge Main (SNSM) network has identified a need for the system to be significantly upgraded to address future growth and system pressure constraints.

By upgrading the system, the SNSM will be able to meet its operational needs and future demands. The upgrade will provide increased wet weather storage, improved pumping efficiencies and a reduction in sewerage retention times which will reduce the amount of odour being produced by the current system.

A Review of Environmental Factors (REF) report has been prepared for this project and publicly exhibited as part of the South Nowra Surcharge Main Upgrade project.

Project Progress

• Review of Environmental Factors exhibited and endorsed in 2022
• Detailed designs completed 2022
• Construction of the works will be undertaken in stages over several years with construction of stage 1 works now initiated (August 2023).
• Package 1: Works are progressing through Worrigee, with gravity sewer mains being installed through Council Reserve from Ratcliff Park to the intersection of Killara and Old Southern Road
• Package 2: Pump station within Ratcliff Park is progressing, with wet well excavation completed, and well construction commencing.

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